Lpi LPI Level 3 Exam (LPI 303: Security) : 117-303

  • Exam Code: 117-303
  • Exam Name: LPI Level 3 Exam (LPI 303: Security)
  • Updated: Sep 08, 2026
  • Q & A: 101 Questions and Answers

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Lpi 117-303 Exam Syllabus Topics:
SectionObjectives
Topic 1: Cryptography and Data Security- PKI and certificates
  • 1. X.509 certificates and trust chains
    • 2. Certificate lifecycle management
      - Encryption technologies
      • 1. OpenSSL usage and certificate management
        • 2. Symmetric and asymmetric encryption
          Topic 2: Access Control and Authentication- Authentication systems
          • 1. PAM configuration and usage
            • 2. LDAP integration
              - Authorization mechanisms
              • 1. Sudo and privilege escalation control
                • 2. File permissions and ACLs
                  Topic 3: Network Security- Firewall and packet filtering
                  • 1. iptables and nftables configuration
                    • 2. Network segmentation and filtering rules
                      - Secure network services
                      • 1. SSH hardening and configuration
                        • 2. VPN setup and management
                          Topic 4: Incident Response and Troubleshooting- Recovery and mitigation
                          • 1. Backup and restore strategies
                            • 2. System recovery after compromise
                              - Security incident handling
                              • 1. Incident detection and response procedures
                                • 2. Forensics basics on Linux systems
                                  Topic 5: System Hardening and Monitoring- System security hardening
                                  • 1. Kernel and service hardening
                                    • 2. Secure boot and system integrity
                                      - Security monitoring and auditing
                                      • 1. Intrusion detection systems (IDS)
                                        • 2. Log analysis and auditd
                                          Lpi LPI Level 3 Exam (LPI 303: Security) Sample Questions:

                                          Question 1

                                          Which of the following commands will create a new, signed tw.pol file?

                                          A. twadmin createpolfile S mykey.key /etc/tripwire/twpol.txt
                                          B. twadmin createcfgfile e S mykey.key /etc/tripwire/twpol.txt
                                          C. twadmin createpolfile e S mykey.key /etc/tripwire/twpol.txt
                                          D. twadmin createcfgfile S mykey.key /etc/tripwire/twpol.txt


                                          Question 2

                                          What does the following iptables rule accomplish:
                                          iptables A INPUT d 10.142.232.1 p tcp dport 20:21 j ACCEPT

                                          A. Forwards all traffic not on port 20 or 21 to the host 10.142.232.1.
                                          B. Forwards all traffic on port 20 and 21 to the host 10.142.232.1.
                                          C. Drops all traffic coming from the host 10.142.232.1 destined for port 20 or 21.
                                          D. Accepts all traffic from the host 10.142.232.1 destined for port 20 or 21.


                                          Question 3

                                          What are the steps which must be followed to enable serverwide zone transfers between two BIND 9 servers securely using TSIG?

                                          A. Generate a key, specify the private key in the named configuration on one server and the public key in the named configuration on the other, create a server statement in the named configuration on both servers.
                                          B. Generate a key, specify the private key in the named configuration on one server and the public key in the named configuration on the other, create a remote statement in the named configuration on both servers.
                                          C. Generate a key, specify the private key in the named configuration on both servers, create a server statement in the named configuration on both servers.
                                          D. Generate a key, specify the public key in the named configuration on both servers, create a server statement in the named configuration on both servers.


                                          Question 4

                                          CORRECT TEXT
                                          An administrator has successfully configured a cryptographic volume for dmcrypt, and has added the following line to /etc/fstab:
                                          /dev/mapper/cryptvol /media/crypt auto defaults 0 0
                                          Upon booting the system, the error message "mount: special device /dev/mapper/cryptvol does not exist" is displayed. What configuration file has the administrator forgotten to edit? (Provide the full path and filename)


                                          Question 5

                                          A user is attempting to connect to a remote server via SSH and receives the following message:
                                          The authenticity of host 'mail.example.com (208.77.188.166)' can't be established.
                                          RSA key fingerprint is 92:32:55:e9:c4:20:ae:1b:2c:d7:91:40:90:89:1c:ad.
                                          Are you sure you want to continue connecting (yes/no)?
                                          What does this indicate?

                                          A. The user's SSH client is incompatible with the server's RSA key.
                                          B. The RSA key fingerprint was found in the SpamCop database, indicating that the remote host is a known spammer.
                                          C. The server's SSH host key cannot be found in the list of known hosts.
                                          D. The user's SSH client was unable to connect to the remote host's authentication agent for verification.


                                          Solutions:

                                          Question 1
                                          Answer: A
                                          Question 2
                                          Answer: B
                                          Question 3
                                          Answer: C
                                          Question 4
                                          Answer: Only visible for members
                                          Question 5
                                          Answer: C

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